J
jonnyc
I always estimate that to cover heat mats properly to approx 5-6mm you will require 1 x 20 kg bag self levelling with fibres to cover 2.50 sq mts.
ie 40 sq mts needs 16 bags but that includes covering areas under units where mat is not fixed so yo end up with even flat floor.
if your fixer has had problems with mats floating up in past he has only himself or the mats he uses to blame.
even with good sticky mats of good quality we still use tape over loose wires and spray glue.
the key is to never leave self adhesive mats overnight before covering and especially if moisture in the air..
they tend to curl up
fixing a cement backed insulation board over 40 sq mts is a man days work and if fixing mats next day , best to prime the boards on first day and let dry out over night.
i know good tilers who cover the heat mat cables or just cable with flex adhesive the day before tile fixing and nothing wrong with that. horses for courses
ie 40 sq mts needs 16 bags but that includes covering areas under units where mat is not fixed so yo end up with even flat floor.
if your fixer has had problems with mats floating up in past he has only himself or the mats he uses to blame.
even with good sticky mats of good quality we still use tape over loose wires and spray glue.
the key is to never leave self adhesive mats overnight before covering and especially if moisture in the air..
they tend to curl up
fixing a cement backed insulation board over 40 sq mts is a man days work and if fixing mats next day , best to prime the boards on first day and let dry out over night.
i know good tilers who cover the heat mat cables or just cable with flex adhesive the day before tile fixing and nothing wrong with that. horses for courses
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